Nokia Nokia Certifications 4A0-107 Questions & Answers

• Question 21:

  According to the SAP-egress policy configured and applied, which queue will AF traffic use?

  

  A. Queue 3, because it is explicitly defined in the SAP-egress policy.

  B. Queue 2, because it is explicitly configured in the queue-group template.

  C. The default, queue 1, because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

  D. AF traffic is dropped because there is a mismatch between the mapping in the SAP-egress policy and in the queue-group template.

  Correct Answer: A

• Question 22:

  Which of the following statements about the token buckets of a policer is TRUE?

  A. When a packet arrives, the PIR bucket depth is checked and the packet is discarded if this bucket is full.

  B. The CIR bucket of a policer is the reserved portion of its PIR bucket.

  C. The CIR bucket of a policer has two thresholds: CBS and HPO.

  D. Packets processed by the PIR bucket at an average rate above PIR will be forwarded as out-of-profile.

  Correct Answer: A

• Question 23:

  Which of the following parameters is taken into account FIRST when a CFHP arbiter allocates bandwidth among its children policers?

  A. PIR

  B. CIR

  C. Level

  D. Weight

  Correct Answer: D

• Question 24:

  Which of the following is NOT a factor when deciding if a packet can be accepted into a queue?

  A. Profile/priority state of a packet

  B. Forwarding class

  C. Queue depth

  D. HPO setting

  Correct Answer: C

• Question 25:

  Forwarding sub-classes are configured in the context of which QoS policy type?

  A. Network

  B. Scheduler

  C. Slope

  D. SAP-ingress

  E. Network queue

  Correct Answer: D

• Question 26:

  How is buffer memory allocated per forwarding complex on a Nokia FP3-based IMM?

  A. 512 MB ingress, 512 MB egress

  B. 512 MB for network ports, 512 MB for access ports

  C. 3.84 GB dynamically allocated between ingress and egress

  D. 2 GB, with a minimum of 512 MB ingress and egress, and an additional 1 GB dynamically allocated

  Correct Answer: D

• Question 27:

  According to the SAP-ingress QoS policy shown, which of the following statements about packets processed by policer 6 is TRUE?

  

  A. All forwarded packets will be in-profile

  B. Packets forwarded above CIR will be marked out-of-profile and the rest will be in-profile

  C. Excess packets that arrive within a burst larger than CBS will be forwarded as out-of-profile

  D. All forwarded packets will be out-of-profile

  Correct Answer: C

• Question 28:

  A profile-mode queue is configured with the following attributes: MBS = 10 KB, CBS = 5 KB and HighPriority-Only = 30%. Assume there is no CBS overbooking, and the slope-policy is disabled. If the current queue depth is 8 KB, what will happen to an in-profile packet?

  A. It will be discarded because the high-priority-only threshold is exceeded.

  B. It will be stored in the queue's reserved buffer space and become out-of-profile.

  C. It will be stored in the queue's reserved buffer space and remain in-profile.

  D. It will contend for shared buffer space with packets from other queues.

  Correct Answer: D

• Question 29:

  A queue-group template can only contain policers (no queues) when applied under which conditions?

  A. When applied at the FP (Forwarding Path) level for access egress

  B. When applied at an access port for ingress or egress

  C. When applied at the FP (Forwarding Pass) level for access ingress

  D. When applied at the port level for network egress

  Correct Answer: C

• Question 30:

  Which of the following features of the Nokia 7750 SR prevents Head of Line blocking in the default queuing model?

  A. Every forwarding class can be associated with its own queue without sharing with other forwarding classes.

  B. A 3-tier scheduling policy can be applied at SAP-ingress/SAP-egress.

  C. For each unicast queue in a SAP-ingress or network-queue policy, there is a separate hardware queue for each destination FFPC.

  D. Policing can be deployed instead of queuing at ingress.

  Correct Answer: C